https://www.gov.uk/guidance/status-of-eu-nationals-in-the-uk-what-you-need-to-know
http://www.nhsconfed.org/-/media/Confederation/Files/public-access/Securing-the-future.pdf?dl=1
https://blogs.lse.ac.uk/brexit/2021/04/13/the-totality-of-uk-irish-relations/
https://www.gov.uk/government/news/david-davis-concludes-visit-to-estonia